Suitable for children aged 3 and above with two safe sound volume settings of 85 dB and 95 dB for the perfect volume adjustment in any environment. Built-in 500 mAh battery providing up to 24 hours of playback time. Fully charged in approximately 2 hours with USB type C charging cable. 10 meters working distance. Extensible adjuster for a flexible custom fit for any head shape. Lightweight, durable, foldable, flexible and comfortable swivel design while in use. Additional 3.5 mm audio cable included. Dimensions: Width 6.99 cm, Height 17.50 cm, Length 16.50 cm, Weight 0.16 kg.